Hi CUET aspirants, Welcome to Amans Maths Blogs (AMBIPi). In this post, you will get CUET Physics Mock Test Electric Charges and Fields AMBIPi. This CUET Physics Mock Test is of the Physics chapter Alternating Current. Before solving these CUET Physics questions, you must read CUET Physics Notes, which helps you to revise CUET Physics Syllabus and then you must need to solve CUET Previous Years Questions Papers.
CUET Physics Mock Test
CUET Physics Question No: 1
Alternating current can not be measured by dc ammeter because
Option A : ac cannot pass through dc ammeter
Option B : Average value of complete cycle is zero
Option C : ac is virtual
Option D : ac changes its direction
Show/Hide Answer Key
Option B: Average value of complete cycle is zero
In dc ammeter, a coil is free to rotate in the magnetic field of a fixed magnet. If an alternating current is passed through such a coil, the torque will reverse its’s direction each time the current changes direction and the average value of the torque will be zero.
CUET Exam Physics Question No: 2
In an ac circuit, peak value of voltage is 423 vol. Its effective voltage is
Option A : 400 volts
Option B : 323 volts
Option C : 300 volts
Option D : 340 volts
Show/Hide Answer Key
Option D: 300 volts
Effective Voltage
CUET UG Physics Question No: 3
In an ac circuit I = 100 sin 200 πt. The time required for the current to achieve its peak value will be
Option A : 1/100 sec
Option B : 1/200 sec
Option C : 1/300 sec
Option D : 1/400 sec
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Option D: 1/400 sec
CUET Domain Subject Physics Question No: 4
The peak value of an alternating current is 6 amp, then r.m.s value of current will be
Option A : 3 A
Option B : 3√3A
Option C : 3√2A
Option D : 2 √3A
Show/Hide Answer Key
Option C: 3√2A
CUET BSc Physics Question No: 5
If E0 represents the peak value of the voltage in an ac circuit, the r.m.s. value of the voltage will be
Option A : E0/π
Option B : E0/2
Option C : E0/√π
Option D : E0/√2
Show/Hide Answer Key
Option D: E0/√2
CUET Entrance Exam Physics Question No: 6
The peak value of 220 volts of ac mains is
Option A : 155.6 volts
Option B : 220 volts
Option C : 311 volts
Option D : 440 volts
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Option C: 311 volts
Peak value =
CUET Exam Question No: 7
A sinusoidal ac current flows through a resistor of resistance R. If the peak current is IP , then the power dissipated is
Option A : Ip2R cosθ
Option B : 1/2 Ip2R
Option C : 4/π Ip2R
Option D : I/π Ip2R
Show/Hide Answer Key
Option B: 1/2 Ip2R
Since f ∝ 1/d2, when r is halved the force becomes four times.
CUET Physics Practice Questions No: 8
The frequency of ac mains in India is
Option A : 80 Hz
Option B : 50 Hz
Option C : 60 Hz
Option D : 120 Hz
Show/Hide Answer Key
Option B: 50 Hz
The frequency of ac mains in India is 50 Hz.
CUET Physics Sample Paper Question No: 9
The root mean square value of the alternating current is equal to
Option A : Twice the peak value
Option B : Half the peak value
Option C : 1/√2 times the peak value
Option D : Equal to the peak value
Show/Hide Answer Key
Option C: 1/√2 times the peak value
The r.m.s value of the alternating current is equal to 1/√2 times the peak value.
CUET Physics Mock Test Question No: 10
The voltage domestic ac is 220 volts. What does this represent
Option A : Mean voltage
Option B : Peak voltage
Option C : Root mean voltage
Option D : Root mean square voltage
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Option D: Root mean square voltage
The voltage of domestic ac is 220 volts. It represents root mean square voltage.
CUET Physics Question No: 11
The process by which ac is converted into dc is known as
Option A : Purification
Option B : Amplification
Option C : Rectification
Option D : Current amplification
Show/Hide Answer Key
Option C: Rectification
The process by which ac is converted into dc is known as rectification.
CUET Exam Physics Question No: 12
The ratio of peak value and r.m.s value of an alternating current is
Option A : 1
Option B : 1/2
Option C : √2
Option D : 1/√2
Show/Hide Answer Key
Option C: √2
The ratio of peak value and r.m.s value of an alternating current is √2.
CUET UG Physics Question No: 13
A transformer is based on the principle of
Option A : Mutual Inductance
Option B : Self inductance
Option C : Ampere’s law
Option D : Lenz’s law
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Option A: Mutual Inductance
A transformer is based on the principle of mutual inductance.
CUET Domain Subject Physics Question No: 14
Which of the following is not an application of eddy currents.
Option A : Induction furnace
Option B : Galvanometer damping
Option C : Speedometer of automobiles
Option D : x-ray crystallography
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Option D: x-ray crystallography
x-ray crystallography is not an application of eddy currents.
CUET BSc Physics Question No: 15
The core of a transformer is laminated to reduce energy losses due to
Option A : Eddy current
Option B : Hysteresis
Option C : Resistance in winding
Option D : None of these
Show/Hide Answer Key
Option A: Eddy current
Circulation of eddy currents is decreased by use of laminated core.
CUET Entrance Exam Physics Question No: 16
Dynamo is a device for converting
Option A : Electrical energy into mechanical energy
Option B : Mechanical energy into electrical energy
Option C : Chemical energy into mechanical energy
Option D : Mechanical energy into Chemical energy
Show/Hide Answer Key
Option B: Mechanical energy into electrical energy
Dynamo is a device for converting mechanical energy into electrical energy.
CUET Exam Question No: 17
The working of dynamo is based on principle of
Option A : Electromagnetic Induction
Option B : Conversion of energy into electricity
Option C : Magnetic effects of current
Option D : Heating effect of current
Show/Hide Answer Key
Option A: Electromagnetic Induction
Rotation of magnet in the dynamo creates the variable flux which in turn produces the induced current.
CUET Physics Practice Questions No: 18
Work of electric motor is
Option A : To convert ac into dc
Option B : To convert dc into ac
Option C : Both (a) and (b)
Option D : To convert ac into mechanical work
Show/Hide Answer Key
Option D: To convert ac into mechanical work
Work of electric motor is to convert ac into mechanical work.
CUET Physics Sample Paper Question No: 19
A transformer is employed to
Option A : Obtain a suitable dc voltage
Option B : convert dc into ac
Option C : obtain a suitable ac voltage
Option D : convert ac into dc
Show/Hide Answer Key
Option C: obtain a suitable ac voltage
A transformer is a device used to convert alternating current at high voltage into low voltage and vice-versa.
CUET Physics Mock Test Question No: 20
What is increased in step-down transformer
Option A : Voltage
Option B : Current
Option C : Power
Option D : Current density
Show/Hide Answer Key
Option B: Current
We know that for step down transformer
current in the secondary coil is greater than the primary.
CUET Physics Question No: 21
The transformation ratio in the step-up transformer is
Option A : 1
Option B : Greater than one
Option C : Less than one
Option D : Depends on the other factors
Show/Hide Answer Key
Option B: Greater than Once
CUET Exam Physics Question No: 22
A step up transformer has transformation ration 5 : 3. What is voltage in secondary if voltage in primary is 60V?
Option A : 20 V
Option B : 60 V
Option C : 100 V
Option D : 180 V
Show/Hide Answer Key
Option C: 100 V
Transformation ratio k = Vs/Vp
