Electricity and magnetism

Question 1 of 10

An electric iron rated 1000 W is used for 2 hours. How much energy does it use in kWh?

Question 2 of 10

Which of the following materials is ferromagnetic?

Question 3 of 10

The e.m.f. of a cell is 1.5 V and its internal resistance is 0.5 Ω. When connected to a 2.5 Ω resistor, the current is

Question 4 of 10

A current of 2 A flows for 30 s. How much charge passes?

Question 5 of 10

A fuse protects a circuit by

Question 6 of 10

A galvanometer of resistance 50 Ω gives full-scale deflection at 1 mA. To convert it into a 10 V voltmeter, connect in series a resistor of

Question 7 of 10

Three 6 Ω resistors are connected in parallel. Their effective resistance is

Question 8 of 10

The device used to protect an electrical circuit from excess current is a

Question 9 of 10

Two 6 Ω resistors in parallel have an effective resistance of

Question 10 of 10

Which material is used for the core of an electromagnet?