When a body is earth conncected, electrons from the earth flow into the body. This means the body is
1). ?charged negatively?
2). ?an insulator?
3). uncharged?
4). charged positively
The heating element of an electric heater should be made of a material having
1). high specific resistance and high melting point
2). high specific resistance and low melting point
3). low specific resistance and low melting point
4). low specific resistance and high melting point
?Two bulbs are fitted in a room in the domestic electric installation. One of them glows brighter than the other. Then
1). the brighter bulb has smaller resistanc?
2). ?the brighter bulb has larger resistance
3). both the bulsbs have the same resistance
4). none of these
The resistance of an ideal ammeter is
1). zero?
2). very low?
3). very high
4). infinite
The resistance of an ideal voltmeter is
1). zero
2). very low
3). very high
4). infinite