Electricity and magnetism

Question 1 of 10

A wire of resistance 10 Ω carries 2 A. The power dissipated is

Question 2 of 10

An electric iron of 1,000 W on 250 V draws a current of

Question 3 of 10

A current of 2 A flows for 10 s. The charge passed is

Question 4 of 10

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

Question 5 of 10

A galvanometer is converted to an ammeter by connecting a

Question 6 of 10

A 9 V battery with internal resistance 1 Ω is short-circuited. The current is

Question 7 of 10

The cost of running a 2 kW heater for 3 hours at GH¢1.50 per kWh is

Question 8 of 10

A fuse protects a circuit by

Question 9 of 10

A galvanometer of resistance 50 Ω and full-scale current 1 mA is converted into a 1 A ammeter. The shunt needed is about

Question 10 of 10

Two 4 Ω resistors in series are connected to a 12 V battery. The current is