Q.1
A rubber rod rubbed with fur becomes
Positively charged
Negatively charged
Both
Neither
Explanation: When the rod is rubbed with fur, electrons are transferred from the fur to the rod. Thus, the rod becomes negatively charged whereas the fur becomes positively charged.
Q.2
A coulomb of charge flowing in a bulb filament powered by a 6-volt battery is provided with
6 ohms.
6 newton
6 watts
6 joules
Q.3
A bird ca sit harmlessly on a high-voltage wire because
The wire is insulated
No potential difference is across the birds feet
Current is inside, not outside, the wire.
The net charge on a current-carrying wire is zero
All of these
Q.4
A certain bulb with a resistance of 95 ohms and labelled “150 W” is designated for use in a
120-V circuit
240-V circuit
Not enough information
Explanation:
Q.5
A sustained electric current can be achieved with a
Generator
Battery
Both
None of these
Q.6
A coulomb of charge passing through a 6-V battery acquires
6 ohms
6 amperes
6 watts
6 joules
Q.7
A power line with a resistance of 2 ohms draws a current of 80 A. the power dissipated in the lie is
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40 W
160 E
320 W
12,800 W
None of these
Explanation:
Q.8
A certain bulb with a resistance of 95 ohms and labelled “150 W” is designated for use in a
120-V circuit
240-V circuit
Not enough information
Explanation:
Q.9
A proton and an electron placed in an electric field experience the same force. Which undergoes the greater acceleration?
Electron
Proton
Both equally
None of these
Explanation: Mass of proton is greater than that of electron.
Q.10
A bird ca sit harmlessly on a high-voltage wire because
The wire is insulated
No potential difference is across the birds feet
Current is inside, not outside, the wire.
The net charge on a current-carrying wire is zero
All of these
