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Class 7
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Physics
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Electric Current and its Effects
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Symbols of Electrical Components
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Electric Cell
Electric Cell
11 Mins
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3 mins
Important Questions
Identify the circuit (Figure 12.3) in which the electrical components have been properly connected
Medium
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When a switch is in OFF position,
i) Circuit starting from the positive terminal of the cell stops at the switch.
ii) Circuit is open.
iii) No current flows through it.
iv) Current flows after some time.
Choose the combination of correct answer from the following.
Medium
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A rheostat is used in an electrical circuit
Easy
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A switch is an on-off device in an electric circuit.
Hard
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In the circuit shown in the figure.
I)Would any of the bulb glow when the switch is in the 'OFF' position?
II) What will be the order in which the bulbs A, B and C will glow when the switch is moved to the 'ON' position?
Easy
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Name a device that helps to maintain a potential difference across a conductor.
Medium
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The main function of a switch is to
Medium
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When the two terminals of a battery are connected directly with a wire then:
Easy
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Where should we place the key or switch in the electric circuits?
Medium
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What is symbol of battery?
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