Current Electricity | Practice MCQs Physics for Mdcat | mosaicbro.com

Current Electricity | Practice MCQs Physics for Mdcat

7 of 85 questions (Page 12 of 13)

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78 Thermocouples convert:
Correct Answer: B
Explanation: Thermocouples generate voltage from temperature differences.
79 Photovoltaic cell converts:
Correct Answer: A
Explanation: Photovoltaic cells (solar cells) convert light to electricity.
80 The unit of electromotive force is:
Correct Answer: C
Explanation: Emf is measured in volts ($1V = 1J/C$).
81 The source of emf converts some form of energy into:
Correct Answer: A
Explanation: Sources of emf (e.g., batteries) convert other energies to electrical energy.
82 Electromotive force is closely related to:
Correct Answer: C
Explanation: Emf and potential difference both relate to energy per unit charge.
83 Batteries or cells convert:
Correct Answer: B
Explanation: Batteries convert stored chemical energy to electrical energy.
84 The emf of a source is equal to the potential difference across the terminals of the source when its internal resistance is:
Correct Answer: A
Explanation: For ideal sources (zero internal resistance), emf = terminal voltage.
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