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Assertion (A): A power factor meter operates on dynamometer principle. Reason (R): A power factor meter does not have a control spring. | |
A. | Both A and R are true and R is correct explanation of A [Wrong Answer] |
B. | Both A and R are true but R is not correct explanation of A [Correct Answer] |
C. | A is true R is false [Wrong Answer] |
D. | A is false R is true [Wrong Answer] |
View Answer
Explanation:-
Answer : B Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
Also Read Similar Questions Below :
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⇒ A full adder is to be implemented using half adders and OR gates. A 4 bit parallel adder without any initial carry requires
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⇒ A full adder is to be implemented using half adders and OR gates. A 4 bit parallel adder without any initial carry requires
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⇒ The difference between phase and frequency modulation
is purely of academic interest
lies in the different definitions of the modulation index
lies in the poor audio response of phase modulation
is too great to make the two systems compatible
⇒ An active network has
an e.m.f source
a current source
neither of the above
either (a) or (b)
⇒ The PSD and the power of a signal g(t) are respectively S_{g}(ω) and P_{g}, the PSD and the power of signal a.g(t) are respectively
aS^{2}_{g} (ω) and a^{2}P_{g}
aS_{g}^{2} (ω) and aP_{g}
aS_{g} (ω) and a^{2}P_{g}
aS_{g} (ω) and aP_{g}
⇒ Lead becomes a superconductor at
9.1 K
7 K
5 K
3 K
⇒ Capacitance hats are installed on low frequency antenna is
increase the electrical length
reduce the electrical length
protect against lightening
protect against corona effects
⇒ In DTL the junction transistor serves as
inverter
buffer amplifier
both (a) and (b)
none of the above
⇒ Which of the following is unlikely to happen when quantising noise is decreased in PCM?
Increased bandwidth
Increased channel noise
Increased number of standard levels
All of the above
⇒ Which of the following compensation method in amplifier can be used to reduce the bandwidth?
Pole-zero compensation
Dominant pole compensation
Lead compensation
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⇒ The circuit of the given figure perf
OR function
AND function
exclusive OR function
exclusive NOR function
⇒ In 8085 microprocessor, which of the following interrupts is unmaskable interrupts?
RST 5.5
RST 7.5
TRAP
INTR
⇒ Principle of superposition is applicable to
linear systems only
nonlinear systems only
both linear and non linear system
linear systems and some nonlinear systems
⇒ The time constant of the circuit after the switch shown in the figure is opene
0.2 s
5 s
0.1 s
dependent on R and hence cannot be determined unless R is known
⇒ In an ac circuit that delivers constant power at varying p.f., the current is
lowest when p.f. is leading
lowest when p.f. is lagging
lowest when p.f is unity
the same for all power factors
⇒ A generator with an internal resistance of 600 Ω drives an amplifier whose input resistance is 400 Ω. The generator's open circuit voltages is 1 mV; the amplifier develops 100mV across an 8kΩ load. The current amplification is
2.5
12.5
25
125
⇒ Nichols chart consists of M and N locii in log magnitude versus phase diagram.
TRUE
FALSE
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1
-1
42738
-1/3
⇒ At 0 K the forbidden energy gap in intrinsic semi conductor is about
10 eV
6 eV
1 eV
0.2 eV
⇒ The function in the given figure can be writte
u(t - 1) sin p ( t - 1) - u(t - 3) sin p (t - 3) + u(t - 4) sin p (t - 4) - u(t - 6) sin p (t - 6)
u(t - 1) sin p ( t - 1) - u(t - 3) sin p (t - 3) + u(t - 4) sin p (t - 4)
u(t - 1) sin p ( t - 1) + u(t - 4) sin p (t - 4)
u(t - 1) sin 2p ( t - 1) + u(t - 4) sin 2p (t - 4)
⇒ A decade counter
counts for ten days
counts ten times faster than a binary counters
counts to 9 and reset on the next pulse
reverts on the pulse after the tenth
⇒ In a multicavity klystron amplifier the signal to be amplified develops an ac voltage of signal frequency across the gap in buncher cavity
TRUE
FALSE
⇒ The probability of recombination of electrons and holes in a semiconductor is proportional to
density of electrons
density of holes
density of electrons and holes
none of the above
⇒ Dynamic memory cells are constructed using
FETs
MOSFETs
Transistors
Flip flops
⇒ A certain network has two ideal voltages sources and a large number of ideal resistances. The power consumed in one of the resistances is 4 W when either of two sources is active and the other source is active and the other source is short circuited. When both sources is short circuited.When both sources are active, the power consumed in the same resistor would be
zero or 16 W
4 W or 8 W
zero or 8 W
8 W or 16 W
⇒ A transmitter power of 10 W is increased by 30 dB. The effective radiated power is
100 W
1000 W
10000 W
100000 W
⇒
Assertion (A): Direct coupled amplifiers are rarely used
Reason (R): Direct coupled amplifiers suffer from the disadvantage of drift
Both A and R are correct and R is correct explanation for A
Both A and R are correct but R is not correct explanation for A
A is correct R is wrong
A is wrong R is correct
⇒ Which of these devices is used in relaxation oscillator?
UJT
SCR
DIAC
TRIAC
⇒ The characteristic equation for the next state (Q_{n+1}) of a J-K flip-flop is
Q_{n+1} = JQ_{n} + KQ_{n}
Q_{n+1} = JQ_{n} + KQ_{n}
Q_{n+1} = JQ_{n} + KQ_{n}
Q_{n+1} = JQ_{n} + KQ_{n}
⇒ The electrical energy required to heat a bucket of water to a certain temperature is 2 kWh. If heat losses, are 25%, the energy input is
2.67 kWh
3 kWh
2.5 kWh
3.5 kWh