7/19/22, 4:54 AM
Quiz No. 7 KMN1 (page 1 of 2)
Advance Engineering Physics
Question 1
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A current is said to be direct current when its
Select one:
a. Direction changes with time
b. Magnitude and direction changes with time
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c. Magnitude changes with time
d. Magnitude remains constant with time
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Quiz No. 7 KMN1 (page 1 of 2)
Question 2
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A capacitor acts as an infinite resistance for
Select one:
a. AC
b. DC as well as AC
c. neither AC nor DC
d. DC
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Quiz No. 7 KMN1 (page 1 of 2)
Question 3
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The RMS value of a sine wave is 100 A. Its peak value is
Select one:
a. 141 A
b. 150 A
c. 282.8 A
d. 70.7 A
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7/19/22, 4:54 AM
Quiz No. 7 KMN1 (page 1 of 2)
Question 4
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Which of the following statements associated with a purely capacitive circuit is not true?
Select one:
a. Power factor is unity.
b. Power consumed is zero.
c. Heat produced is zero.
d. Power factor is zero.
e. Work done is zero.
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7/19/22, 4:54 AM
Quiz No. 7 KMN1 (page 1 of 2)
Question 5
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The capacitive reactance in an A.C. circuit is
Select one:
a. effective resistance due to capacity
b. effective voltage
c. effective wattage
d. None of these
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7/19/22, 4:54 AM
Quiz No. 7 KMN1 (page 1 of 2)
Question 6
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A 100 W, 100 V bulb is to be supplied from 220 V, 50 Hz supply. Which of the following arrangements is preferable?
Select one:
a. Additional resistance in series with the lamp.
b. Additional pure inductance in series with lamp.
c. Additional inductance and capacitance in series with the lamp.
d. None of the above
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Quiz No. 7 KMN1 (page 1 of 2)
Question 7
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The reactance offered by a capacitor to alternating current of frequency 50 Hz is 10 Ω. If the frequency is increased to 100 Hz,
reactance becomes:
Select one:
a. 20 ohms
b. 2.5 ohms
c. 5 ohms
d. 40 ohms
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7/19/22, 4:54 AM
Quiz No. 7 KMN1 (page 1 of 2)
Question 8
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The electric mains supply in our homes and offices is a voltage that varies like a sine function with time such a voltage is called
A
and the current driven by it in a circuit is called the
B
Here, A and B refer to
Select one:
a. AC voltage, AC current
b. AC voltage, DC voltage
c. DC voltage, AC current
d. AC voltage, DC current
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Quiz No. 7 KMN1 (page 1 of 2)
Question 9
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When an ac voltage of 220 V is applied to the capacitor C, then
Select one:
a. the maximum voltage between plates is 220 V.
b. the current is in phase with the applied voltage.
c. power delivered to the capacitor per cycle is zero.
d. the charge on the plate is not in phase with the applied voltage.
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Quiz No. 7 KMN1 (page 1 of 2)
Question 10
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Ohm is unit of all of the following except
Select one:
a.
Capacitance
b.
Resistance
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c.
Inductive reactance
d.
Capacitive reactance
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7/19/22, 4:54 AM
Quiz No. 7 KMN1 (page 1 of 2)
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