Sindh MDCAT 2020 Paper Page 9

Sindh MDCAT 2020 Paper

161- In translation from grid station, power losses are minimised by:

A. Increasing current

B. Decreasing current

C. Increasing resistance

D. Increasing voltage

View Answer

Answer : D. Increasing voltage

Description

162- The domestic electricity supply has a frequency of:

A. 25 Hz

B. 50 Hz

C. 100 Hz

D. 150 Hz

View Answer

Answer : A. 25 Hz

Description

163- PIV stands for:

A. Positive Inverse voltage

B. Power integrated voltage

C. Peak inverse voltage

D. Peak integrated voltage

View Answer

Answer : C. Peak inverse voltage

Description

164- In full wave rectification, the diodes are used:

A. 1

B. 2

C. 3

D. 4

View Answer

Answer : B. 2

Description

165- The wavelength associated with an electron is of the order of:

A. Visible light

B. X – rays

C. Radio waves

D. Infrared

View Answer

Answer : B. X - rays

Description

166- Which Photon carries the most energy?

A. Blue

B. Voilet

C. Red

D. Green

View Answer

Answer : B. Voilet

Description

167- Which one of the following series lies in the ultraviolet region?

A. Balmer series

B. Paschen series

C. Lyman series

D. Bracket series

View Answer

Answer : C. Lyman series

Description

168- The main difference between X-rays and gamma rays is?

A. Frequency

B. Wavelength

C. Energy

D. Origin

View Answer

Answer : D. Origin

Description

169- There are initially 400 atoms in a radioactive sample, what would be the number of atoms after three half-life?

A. 25

B. 50

C. 200

D. 400

View Answer

Answer : B. 50

Description

170- While using radiation therapy, cancerous thyroid is treated with ______ radioisotope:

A. Carbon

B. 235-Uranium

C. Thorium

D. Iodine-131

View Answer

Answer : D. Iodine-131

Description

171- In capacitors, energy is stored in the form of:

A. Gravitation energy

B. Kinetic energy

C. Electric intensity

D. Magnetic induction

View Answer

Answer : C. Electric intensity

Description

172- Ohm time's farads is equivalent to:

A. Time

B. Charge

C. Distance

D. Capacitors

View Answer

Answer : A. Time

Description

173- One-kilowatt hour is commonly termed as one commercial unit of electric energy which is equal to:

A. 3.6 x 10^3 J

B. 3.6 x 10^4 J

C. 3.6 x 10^5 J

D. 3.6 x 10^6 J

View Answer

Answer : D. 3.6 x 10^6 J

Description

174- When a wire is compressed and its radius become 2R then its resistance will be:

A. 16 R

B. 4 R

C. 1/16 R

D. 1/4 R

View Answer

Answer : D. 1/4 R

Description

175- One of the following is an ohmic device:

A. Filament bulb

B. Semiconductor diode

C. Transistors

D. Copper wire

View Answer

Answer : D. Copper wire

Description

176- The change in resistance of metallic conductor at temperature below 0°C is:

A. Non linear

B. Curve

C. Linear

D. Curvilinear

View Answer

Answer : C. Linear

Description

177- When current are flowing through two long parallel wires same direction electric field between them:

A. Strong

B. Weak

C. Remains same

D. Infinite

View Answer

Answer : B. Weak

Description

178- Magnetic flux is maximum when angle between magnetic field and vector area is:

A. 0°C

B. 45°C

C. 90°C

D. 180°C

View Answer

Answer : A. 0°C

Description

179- Transformer is a device which steps up or steps down the input: A. Current

A. Current

B. Voltage

C. Energy

D. Power

View Answer

Answer : B. Voltage

Description