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Physics 10 Chapter 15 - Electromagnetism - 19
1.
What is the electric switch called that opens and closes under the control of another electrical circuit?
a) Electric bell
b) Handle bell
c) Alarm
d) Relay
2.
How many switches are present in a relay?
a) Two switches
b) One switch
c) Four switches
d) Three switches
3.
What is supplied by first circuit of the relay to the electromagnet?
a) Potential difference
b) Voltage
c) Current
d) Power
4.
What is supplied by input circuit of the relay to the electromagnet?
a) Potential difference
b) Current
c) Power
d) Voltage
5.
How many circuits are present in a relay?
a) One circuit
b) Three circuits
c) Four circuits
d) Two circuits
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