Magnetic flux density has the dimensions MI-1T-2 M-1I-2T-2 ML-3T-2 MI-1T-3 Flux

CuriousTab

CuriousTab

Home Aptitude

Discussion

Home ‣ Electronics and Communication Engineering ‣ Measurements and Instrumentation See What Others Are Saying!

Question
Magnetic flux density has the dimensions
Options
A. MI^-1T^-2
B. M^-1I^-2T^-2
C. ML^-3T^-2
D. MI^-1T^-3

Correct Answer

MI^-1T^-2

Explanation

Flux density = flux/area.

More questions

1. In a radio receiver, if the intermediate frequency is too low
Options
A. Image-frequency rejection will improve
B. Selectivity will be too sharp
C. The frequency selectivity of the local oscillator will have to be lowered
D. All of the above

2. In the given figure shows pole-zero plot. If steady state gain is 2 the transfer function G(s) is
Options
A.
B.
C.
D.

3. A single phase half wave converter is feeding-a resistor load. The input voltage is v = V_m sin ?t. If firing angle is zero, the output dc voltage V_dc and output rms voltage V_rms respectively
Options
A.
B.
C.
D.

4. In FM signal with a modulation index m_f is passed through a frequency tripler. The wave in the output of the tripler will have a modulation index of
Options
A. m_f
B. 3m_f
C. m_f/3
D. m_f/9

6. For a 400 kHz transmission line having L = 0.5 mH/km, C = 0.08 mF and negligible R and G, the value of propagation constant P will be
Options
A. 15.9 radians/km
B. 31.8 radians/km
C. 63.6 radians/km
D. 105.4 radians/km

7. What about the stability of system in
Options
A. system is stable
B. unstable
C. stable at 0.4
D. cant say

8. If the minimum range of a radar is to be doubled, the peak power has to be increased by a factor of
Options
A. 2
B. 4
C. 8
D. 16

9. An amplifier without feedback has a voltage gain of 50, input resistance of 1 k? and output resistance of 2.5 k?. The input resistance of the current shunt -ve feedback amplifier using the above amplifier with a feedback factor of 0.2 is
Options
A. 1/11 k?
B. 1/5 k?
C. 5 kW
D. 11 kW

10. A single phase series converter is used for
Options
A. high voltage output
B. high current output
C. high voltage and high current output
D. improving the circuit efficiency

Comments

There are no comments.

More in Electronics and Communication Engineering: