Question is ⇒ The current through the coil of an electromagnet is doubled. The magnetic field around the coil, Options are ⇒ (A) is halved, (B) is doubled, (C) becomes four times, (D) remains the same, (E) , Leave your comments or Download question paper.

Question is ⇒ The current through the coil of an electromagnet is doubled. The magnetic field around the coil, Options are ⇒ (A) is halved, (B) is doubled, (C) becomes four times, (D) remains the same, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	The current through the coil of an electromagnet is doubled. The magnetic field around the coil
A.	is halved [Wrong Answer]
B.	is doubled [Correct Answer]
C.	becomes four times [Wrong Answer]
D.	remains the same [Wrong Answer]
View Answer 2 -1 Explanation:- Answer : B Discuss it below : !! OOPS Login [Click here] is required to post your answer/result Help other students, write article, leave your comments

Previous question Next question

Also Read Similar Questions Below :

⇒ Virus is a
computer hardware problem
an operating system
a computer program
a computer language

⇒ If the target area is small compared to wavelength of radar the situation is called
resonance region
Rayleigh region
optical region
binomial region

⇒ The phase velocity of an EM wave propagating in a hollow metallic rectangular waveguide in the TE₁₀ mode is
equal to its group velocity
less than the velocity of light in free space
equal to the velocity of light in free space
greater than the velocity of light in free space

⇒ A 16:1 multiplexer has 4 select input lines.
TRUE
FALSE

⇒ For a Mod 64 parallel counter we need
6 flip flops
6 flip flops and 2 AND gates
6 flip flops and 4 AND gates
none of the above

⇒ Choose the correct option

Mesh is the smallest loop of circuit
Loop is smallest path of circuit
Loop does not contain any mesh
Loop may have one or more than one mesh

1, 2, 3, 4
3, 4, 2
1, 4
3, 2

⇒ In the circuit of figure for sinusoidal input the waveform of the output will be as show
figure A
figure B
figure C
figure D

⇒ The output impedance of a logic pulser is
low
high
may be Low or High
can't say

⇒ A number given in binary as 0101.01 is to be scaled up 4 times. The scaled up binary is
10101
1.0101
404.04
10.101

⇒ X and Y are two random variable and Z = X + Y. Let σ_x², σ_y² and σ_z² be variance of X, Y and Z. Then
σ_z² = σ_x² + σ_y²
σ_z² ≤ σ_x² + σ_y²
σ_z² < σ_x² + σ_y²
σ_z² > σ_x² + σ_y²

⇒ The rate at which information can be carried through a communication channel depends on
carrier frequency
bandwidth
transmission loss
transmitted power

⇒ For Disk partitioning th DOS command is
F DISK
H DISK
A DISK
D DISK

⇒ The impedance inversion may be objected with
a short-circuited stub
an open-circuited stub
a half-wave line
a quarter-wave line

⇒ As a compared to a CB amplifier, a CE amplifier has
lower current amplification
higher current amplification
lower input resistance
higher input resistance

⇒ As per temperature limits, the number of categories of solid dielectrics are
7
6
8
5

⇒

Assertion (A): 2's complement arithmetic is preferred in digital computers

Reason (R): The hardware required to obtain 2's complement is simple.

Both A and R are correct and R is correct explanation of A
Both A and R are correct but R is not correct explanation of A
A is true, R is false
A is false, R is true

⇒ Consider the following DO statement in Fortran 77 1
11
10
4

⇒ A certain transistor has a_dc of 0.98 and a collectors leakage current of 5 μA. If I_E = 1 mA, the collector current will be
1.005 mA
0.985 mA
0.975 mA
0.955 mA

⇒ In an ideal diode there is no breakdown, no __________ current, and no forward __________ drop.
reverse, voltage
forward, current
forward, voltage
reverse, current

⇒ A tweeter should be fed from the input through a
low pass filter
high pass filter
band pass filter
band stop filter

⇒ Which of the following measurements can be done using a counter?

Pulse duration
Interval between two pulses
Amplitude of the pulse
Rise time of a pulse

Select the correct answer from the codes given below:
1 and 2
2 and 3
1 and 4
2 and 4

⇒ The receiver of a pulsed RADAR can detect signal power in the order of
1 W
0.1 W
10^-5 W
10^-12 W

⇒ The purpose of impedance matching in an amplifier circuit is to achieve
high efficiency
reduce distortion
maximum power transfer
none of the above

⇒ An excitation is applied to a system at t = T, and its response is zero for -∞ < t < T, such a system is
non-causal system
Stable system
causal system
unstable system

⇒

Assertion (A): Many instruments use eddy current damping.

Reason (R): Eddy currents set up a magnetic flux which opposes the original movement which generates them.

Both A and R are true and R is correct explanation of A
Both A and R are true but R is not correct explanation of A
A is true R is false
A is false R is true

⇒ Which chopper circuit operates in quadrants 1 and 4?
A
B
D
E

⇒ Race condition occurs in
synchronous circuit
asynchronous circuit
combinational circuit
all the Digital circuit

⇒ If each stage has a gain of 10 dB and noise figure of 10 dB, then the overall noise figure of a two stage cascade amplifier will be
10
1.09
1
10.9

⇒ Find the radiation resistance of an antenna of length λ/10 meter?
8 Ω
780 Ω
7.8 Ω
78 Ω

⇒ The circuit in the given figur
low pass filter
high pass filter
band Pass filter
band reject filter