Class 10 Practice - Level 3 - Set 2 - Electricity

Total questions: 15

A resistor of 50Ω is connected to a 200V power supply. What is the power dissipated by the resistor?

Topic: Ohm's Law and Power

100W

200W

400W

800W

None

In a circuit with two loops, one loop has a 10V battery and a 5Ω resistor, and the other loop has a 5V battery and a 10Ω resistor. If the current in the first loop is 1A, what is the current in the second loop?

Topic: Kirchhoff's Voltage Law

0.5A

1.5A

None

An RLC circuit has R = 5Ω, L = 0.2H, and C = 25μF. What is the resonant frequency of the circuit?

Topic: Resonance in RLC Circuits

50Hz

100Hz

150Hz

200Hz

None

An AC circuit with a power factor of 0.6 has an apparent power of 600VA. What is the real power?

Topic: Power Factor in AC Circuits

360W

400W

480W

600W

None

A capacitor of 20μF is charged to a potential difference of 50V. What is the energy stored in the capacitor?

Topic: Capacitance and Energy Storage

0.025J

0.5J

25J

2.5J

None

A coil of 200 turns is exposed to a changing magnetic flux at a rate of 0.1Wb/s. What is the induced emf in the coil?

Topic: Magnetic Flux and Induced EMF

10V

20V

30V

40V

None

Two resistors, 20Ω and 30Ω, are connected in parallel. What is the equivalent resistance?

Topic: Series and Parallel Resistors

12Ω

15Ω

18Ω

50Ω

None

A coil of 500 turns is placed in a magnetic field. If the magnetic flux changes from 0.01Wb to 0.03Wb in 0.2s, what is the induced emf?

Topic: Electromagnetic Induction

50V

25V

10V

None

A capacitor of 10μF is charged to 12V and then connected to a 2kΩ resistor. How long will it take for the voltage across the capacitor to drop to 3V?

Topic: RC Circuit Discharge

10ms

20ms

30ms

40ms

None

10.

Three resistors of 10Ω each are connected in series to a 30V battery. What is the power dissipated by each resistor?

Topic: Power Dissipation in Resistors

10W

20W

30W

40W

None

11.

Two inductors of 5H and 10H are connected in series. What is the total inductance?

Topic: Inductors in Series

3.33H

7.5H

15H

50H

None

12.

A charge of 4C is placed in an electric field of 10N/C. What is the electric potential energy if the charge is moved 2m along the field?

Topic: Electric Potential Energy

80J

60J

40J

20J

None

13.

A transformer has a primary coil with 100 turns and a secondary coil with 50 turns. If the primary voltage is 240V, what is the secondary voltage?

Topic: Transformer Voltage Ratio

120V

240V

480V

60V

None

14.

A capacitor of 10μF is connected to an AC source of frequency 50Hz. What is the capacitive reactance?

Topic: AC Circuit and Reactance

100Ω

200Ω

318Ω

400Ω

None

15.

An RC circuit with R = 1kΩ and C = 10μF is connected to a 12V supply. What is the voltage across the capacitor after one time constant?

Topic: RC Circuit Charging

7.6V

12V

None

1 out of 15

Time's up

Class 10 Practice - Level 3 - Set 2 - Electricity

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