The electrical energy required to heat a bucket of water to a certain temperatur

CuriousTab

CuriousTab

Home Aptitude

Discussion

Home ‣ Electronics and Communication Engineering ‣ Networks Analysis and Synthesis See What Others Are Saying!

Question
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
Options
A. 2.67 kWh
B. 3 kWh
C. 2.5 kWh
D. 3.5 kWh

Correct Answer

2.67 kWh

Explanation

Since 25% of input is lost, 0.75 Input = 2 or input =

The electrical energy required to heat a bucket of water to a certain temperature is 2 kWh. If heat

More questions

1. Consider the following statements
1. Gunn diode can be used in combinational logic circuits.
2. Gunn diode can be used in sequential logic circuits.
3. Both Gunn diode and GaAs Mesfet can be used in logic circuits.
Which of the above statements are correct?
Options
A. 1, 2, and 3
B. 1 and 2 only
C. 2 and 3 only
D. 1 and 3 only

3. Match the following:

	List I		List II
A.	Detection of a periodic signal in noise	1.	Increase in bandwidth
B.	Recovery of a band limited signal from its uniformly sampled values	2.	Slope overload error
C.	Finer quantization of signal	3.	Nyquist rate
D.	Delta modulation	4.	Cross correlation

Options
A. A-4, B-3, C-1, D-2
B. A-3, B-4, C-2, D-1
C. A-4, B-3, C-2, D-1
D. A-4, B-2, C-1, D-3

4. VSB modulation is preferred in TV because
Options
A. it reduces the bandwidth requirement to half
B. it avoids phase distortion at low frequencies
C. it results in better reception
D. none of the above

5. Assertion (A): When a high reverse voltage is applied to a p-n junction the diode breaks down.
Reason (R): High reverse voltage causes Avalanche effect.
Options
A. Both A and R are true and R is correct explanation of A
B. Both A and R are true but R is not a correct explanation of A
C. A is true but R is false
D. A is false but R is true

7. As the frequency increases, the absorption of ground wave by earth's surface
Options
A. decreases
B. increases
C. remains the same
D. either (a) or (c)

8. The velocity of sound waves in air
Options
A. is constant at all temperatures
B. varies directly as temperature
C. varies inversely as absolute temperature
D. varies directly as square root of absolute temperature

9. A dielectric is subjected to alternating field. The dielectric losses are potential to
Options
A. real part of dielectric constant
B. imaginary part of dielectric constant
C. both real and imaginary parts of dielectric constant
D. either real or imaginary part of dielectric constant

10. Consider the following time parameters
1. Domain growth time constant.
2. Transit time.
3. Dielectric relaxation time in positive mobility regime.
Which of the above are used in connection width transferred electron device?
Options
A. 1, 2, and 3
B. 1 and 2 only
C. 1 and 3 only
D. 2 and 3 only

Comments

There are no comments.

More in Electronics and Communication Engineering: