**Ques 61. **In a uniform electric field, field lines and equipotentials

- Are parallel to one another
- Intersect at 45°
- Intersect at 30°
**Are orthogonal✓**

**Ques 62. **During forward blocking state, the SCR has

- Low current, medium voltage
**Low current, large voltage✓**- Medium current, large voltage
- Large current, low voltage

**Ques 63. **Turn-on time for an SCR can be reduced by using a

**Rectangular pulse of high amplitude and narrow width✓**- Rectangular pulse of low amplitude and wide width
- Triangular pulse
- Trapezoidal pulse

**Ques 64. **The disruptive critical voltage will

**Decrease with the increase of moisture content in the air✓**- Increase with the increase of moisture content in the air
- Increase with the decrease of moisture content in the air
- Decrease with the decrease of moisture content in the air

**Ques 65. **What type of insulator will be used in the direction of the transmission line is to be changed?

- Pin-type
- Suspension type
**Strain type✓**- Shackle type

**Ques 66. **Which statement about S_{F6} gas is correct?

**S**_{F6}gas is toxic✓- S
_{F6}gas is lighter than air - S
_{F6}gas is yellow in color - S
_{F6}gas has the pungent smell

**Ques 67. **One coulomb of electrical charge is contributed by how many electrons?

**6.24 × 10**^{18}✓- 1.6 × 10
^{19} - 10
^{19} - None of these

**Ques 68. **A dynamic system with input x(t) and output y(t) is represented by the following:

- y(t)= ax(t) +bx
^{2}(t) - y(t)= ax sin(t)
**y(t)= f(x(t),t)✓**- None of these

If the impulse response of the discrete-time LTI system is not identically zero then the system is called a Dynamic system or system with memory.

The Dynamic system is represented by

** y(t) = f(x(t),t)**

For example, the systems defined below are dynamic or memory systems.

y(t)=x(t-1)

y(t)=x(t)+x(t+2)

**Ques 69. **Three equal resistors each equal to R ohm are connected as shown in fig. The equivalent resistance between points A and B is:

- R
- 3R
- 2R/3
**R/3✓**

**Ques 70. **The time constant of the circuit shown in fig. is:

- RC/3
- 4RC/3
- 2RC/3
**8RC/3✓**

**Ques 71. **If the current in the armature of the d.c series motor is reduced to 5%, the torque of the motor will become:

- 50% of the Previous Value
**25% of the Previous Value✓**- 150% of the Previous Value
- 100% of the Previous Value

**Ques 72. **If the excitation of an alternator operating in parallel with other alternators decreases, its:

**Power factor becomes more leading✓**- Output KW will change
- Power factor becomes more lagging
- Power factor becomes unity

**Ques 73. **The output signal of a common-collector amplifier is always:

- Larger than the input signal
**In phase with the input signal✓**- Out of phase with the input signal
- Exactly equal to the input signal

**Ques 74. **A current is said to be alternating when it changes in:

- Magnitude
- Direction
**Both magnitude and direction✓**- None of these

**Ques 75. ** Hysteresis loss in a transformer depends upon:

**Frequency✓**- Supply voltage
- Square of the frequency alone
- Square of the voltage alone

**For SSC JE Conventional Solved Paper 2017 CLICK HERE**

**For SSC JE Conventional Solved Paper 2016 CLICK HERE**