**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 if the direction of the transmission line is to be changed?

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

**Ques 66. **Which statement 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 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 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 decreased, 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 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**

Shrey MeenaPlease upload questions and solutions of DMRC JE 2017 paper of electrical

SHRUTI YADAVQ 66..Which option is correct?