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The following question based on electric current and magnetism topic of general science mcq
(a) energy and magnetic field
(b) charge
(c) energy
(d) magnetic field
The correct answers to the above question in:
Answer: (c)
Faraday’s laws are based on the conversion of electrical energy into mechanical energy; which is in accordance with the law of conservation of energy
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Read more physics gk Based General Science Questions and Answers
Question : 1
According to international convention of colour coding in a wire
a) live is red, neutral is green and earth is black
b) live is brown, neutral is blue and earth is black
c) live is red, neutral is black and earth is green
d) live is red, neutral is black and earth is green
Answer »Answer: (d)
Question : 2
Consider the following statements: An ordinary light bulb has a rather short life because the:
- filament wire is not uniform.
- bulb cannot be evacuated completely.
- wires supporting the filament melt at high temperatures.
a) 1 and 2
b) 1 and 3
c) 2 and 3
d) 1, 2 and 3
Answer »Answer: (d)
Question : 3
At the time of short circuit, the current in the circuit
a) does not change
b) increases heavily
c) reduces substantially
d) vary continuously
Answer »Answer: (b)
Question : 4
Given below are two statements, one labelled as Assertion (A) and the other labelled as Reason (R).
Assertion (A):
Transformer is useful for stepping up or stepping down voltages.
Reason (R):
Transformer is a device used in D.C. circuits.
In the context of the above two statements, which one of the following is correct?
a) (A) is true, but (R) is false
b) Both (A) and (R) are true and (R) is the correct explanation of (A)
c) Both (A) and (R) are true, but (R) is not the correct explanation of (A)
d) (A) is false, but (R) is true
Answer »Answer: (a)
Question : 5
Consider the following statements regarding a motor car battery:
- The voltage is usually 12 V.
- Electrolyte used is hydrochloric acid.
- Electrodes are lead and copper.
- Capacity is expressed in ampere-hour.
a) 3 and 4
b) 1 and 2
c) 2 and 3
d) 1 and 4
Answer »Answer: (d)
In case of motor car battery or automotive batteries a nominal 12-volt potential difference is provided by connecting six galvanic cells in series. Capacity of these batteries is expressed in ampere-hour.
Electrolyte used is a solution of about 35% sulphuric acid and 65% water and electrodes used are plates of lead and separate plates of lead dioxide.
Question : 6
Electricity consumption bill is based on the measurement of
- Watt
- Voltage
- Ohm
- Ampere
a) 2 and 3
b) Only 1
c) 1 and 2
d) 1 and 4
Answer »Answer: (b)
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