Question: A CRO is used to measure _________________?

• 1. Voltage
• 2. Frequency
• 3. Phase
• 4. All of above

Question: A voltmeter has a resistance of G ohms and range V volts. The value of resistance required in series to convert it into voltmeter of range nV is________________?

• 1. nG
• 2. G/n
• 3. G/(n-1)
• 4. (n-1)G

Question: Which of the following is likely to have the largest resistance ?

• 1. Voltmeter of range 10 V
• 2. Moving coil galvanometer
• 3. Ammeter of range 1 A
• 4. A copper wire of length 1 m and diameter 3 mm

Question: The resistance of an ideal voltmeter is ______________?

• 1. Low
• 2. Infinite
• 3. Zero
• 4. High

Question: If 2% of the main current is to be passed through a galvanometer of resistance G, then resistance of the shunt required is ________________?

• 1. G/50
• 2. G/49
• 3. 49 G
• 4. 50 G

Question: The horizontal plates of a CRO are supplied with _____________ to observe the waveform of signal?

• 1. Sinusoidal wave
• 2. Cosine wave
• 3. Sawtooth wave
• 4. None of the above

Question: An ideal ammeter has ______________ resistance?

• 1. Low
• 2. Infinite
• 3. Zero
• 4. High

Question: To send 10% of the main current through a moving coil galvanometer of resistance 99 O the shunt required is______________?

• 1. 11 O
• 2. 9 O
• 3. 100 O
• 4. 9 O

Question: If the negative potential on the control grid of CRT is increased, the intensity of spot _____________?

• 1. Is increased
• 2. Is decreased
• 3. Remains the same
• 4. None of the above

Question: Two multimeters A and B have sensitivities of 10 kO/V and 30 kO/V respectively. Then ______________?

• 1. Multimeter A is more sensitive
• 2. Multimeter B is more sensitive
• 3. Both are equally sensitive
• 4. None of the above