# The internal resistance of the voltmeter must be very high in order to have

10 views

The internal resistance of the voltmeter must be very high in order to have Minimum current through the meter.

## Related questions

An accurate voltmeter must have an internal impedance of (A) very low value. (B) very high value (C) medium value. (D) zero Value

An ammeter has a current change of 0—5A and its internal resistance is 0.2 ohm. In order to Change the range to 0-25 A, wear need to add a resistance of  A) 0.8 ohm in series with the meter B) 1.0 ohm in series with the meter C) 0.04 ohm in parallel with the meter D) 0.05 ohm in parallel with the meter

For high efficiency of transfer of power, internal resistance of the source should be?

A semiconductor device made out of a material having very high temperature coefficient of resistance is

A 1mA D' Arsonval movement has resistance of 100 Ω. It is to be converted to a 10 V voltmeter. The value of multiplier resistance is  (A) 999 Ω (B) 9999 Ω (C) 9900 Ω (D) 990 Ω

A high-pass filter has a resistance R = 2 kΩ The lowest input frequency to be passed is 7.5 kHz. The value of suitable coupling capacitor must be: A) 0.001 pico Farad B) 0.01 pico Farad C) 0.1 pico Farad D) 1 pico Farad

In order to increase the range of a voltmeter

For a waveform to be expressed in Fourier series, which of the following conditions must be satisfied? I. Maxwell’s conditions, II. Drichlet conditions, III. Sampling Theorem A) I only B) II only C) II and III only D) I, II and III

For a desirable transient response of a second order system, the damping ratio must be between (a) 0.4 and 0.8 (b) 0.8 and 1.0 (c) 0.3 and 0.5 (d) 0.2 and 0.4

In order to get maximum power transfer from a capacitive source, the load must? A.have a capacitive reactance equal to circuit resistance B.have an impedance that is the complex conjugate of the source impedance C.be as capacitive as it is inductive D.none of the above

Which of the following instruments can be used for measurement of very high value resistances such as insulation resistance in industries? A) Wheatstone bridge B) Megger C) Ohm-meter D) Resistive potentiometer

Which of the following noise must be considered at high frequencies (microwave frequencies)? (1) Shot noise (2) Random noise (3) Impulse noise (4) Transit time noise

In order to reduce the harmful effects of harmonics on the AC side of a high voltage DC transmission system_____ are provided. (A) synchronous condensers (B) shunt capacitors (C) shunt filters (D) static compensators

In order to have a lower cost of electrical energy generation the load factor  (1) and the diversity factor should be low (2) should be low but the diversity factor should be high (3) should be high but the diversity factor should be low (4) and the diversity factor both should be high

To measure insulation resistance of equipments of voltage rating upto 440 V the megger generator must generate   (a) 220 V (b) 440 V (c) 500 V (d) None of these

Among the logic families, the family which can be used at very high frequency greater than 100 MHz in a 4 bit synchronous counter is

In order to recover the original signal from the Sampled one, what is the condition to be satisfied for sampling frequency ωs and highest frequency component ωm?  (A) ωm < ωs ≤ 2 ωm (B) ωs ≥ 2 ωm (C) ωs < ωm (D) ωs = ωm

For maximum transfer of power, internal resistance of the source should be?

In the case of an unsymmetrical alternating current the average value must always be taken over?

Five cells, each with an e.m.f. of 2V and internal resistance of 0.5Ω are connected in series. The resulting battery will have

In the first Cauer network, with a pole at infinity, the first element must be

The internal resistance of an ideal voltage source is : (A) Zero (B) Infinity (C) A finite value (D) None of the above

Which of the following will happen if a voltmeter is connected like an ammeter in series to the load ? (A) There will be almost no current in the circuit. (B) The meter will burn. (C) The measurement will be trio high. (D)  A very high current will flow.

A high pass filter has a resistance R = 2 kΩ. The lowest input frequency to be passed is 7.5 KHz. The value of suitable coupling capacitor must be : (A) 0.1 pF (B) 1 pF (C) 0.1 μ F (D) 1 μ F

At very high freqencies the type of diode used for rectification is  A) Abrupt junction B) Graded junction C) Point contact D) Tunnel

A true rms reading voltmeter uses two thermocouple in order: -  a) to increase sensitivity b) that a second thermocouple cancels out the no linear effect of the first thermocouple c) to prevent drift in the dic. Amplifier d) all of the above

In a single phase induction motor driving a fan load, the reason for having a high resistance rotor is to achieve (A) low starting torque (B) quick acceleration (C) high efficiency (D) reduced size

A high-Q tuned circuit in an amplifier permits to have high (a) selectivity (b) fidelity (c) sensitivity (d) frequency ranges

For high speed reading and storing of information in a computer, the core shall be of (a) Ferrite (b) Piezoelectric (c) Pyroelectric (d) Ferromagnetic above 768°C

Which transducer has very nonlinear and high temperature co-efficient characteristics ? (a) thermistor (c) pyrometer (b) thermocouple (d) thermometer

Series resistance required to read 0-250 V with a moving coil instrument of internal resistance 2 ohm and full scale deflection of 50 mA is (a) 49998 Ω (b) 4998 Ω (c) 498 Ω (d) 49.8 Ω

Internal resistance of a micro-ammeter is 500 ohm. Shunt resistance required to increase its range from 0-100 µA to 0-10 A will be approximately (a) 0.05 Ω (b) 0.005 Ω (c) 0.5 Ω (d) 5.0 Ω

The leakage current must not be more than ____________ of maximum supply current