An electric charge in uniform motion produces

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An electric charge in uniform motion produces

Aan electric field only

Ba magnetic field only

Cboth electric and magnetic field

DNone of these

prajwal ? Dec 24 '2019 at 10:2

Correct answer is: both electric and magnetic field

Explanation:

The electric charge is defined as an intrinsic fundamental quantity that is present in every matter that exists.

It produces:

• The electric field.
• The magnetic field.

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• Electric charge always has an influencing space around it that has an electric field defined at every point in three-dimensional space irrespective of the motion of the charge. So, either it is in motion or not in motion, always have an electric field around it.
• Whenever a charge is in motion, due to its speed, temporary magnetic space is created around it which is there only till the charge is in motion. So, charge in motion has magnetic fields around it.

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The line joining the north and south poles of a magnet is called

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The line joining the north and south poles of a magnet is called

AMagnetic axis

BMagnetic Meridian

CMagnetic field

DNone of these

prakash ? Jan 2 '2020 at 12:16

Correct answer is: Magnetic axis

Explanation:

If the line joining NORTH and SOUTH POLE of a magnet or of the EARTH is a straight line. it is called AXIS (magnetic axis in magnetism).

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If the length and cross sectional area of a wire are doubled, its resistance will

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If the length and cross sectional area of a wire are doubled, its resistance will

Aremain unchanged

Bbecome twice

Creduce to one half

Dincrease four times

prakash ? Jan 2 '2020 at 13:4

Correct answer is: remain unchanged

Explanation:

Wire’s cross section doubled means its cross section area is doubled.

$\text{ Resistance} = \text{specific resistance} \times \frac{\text{length}}{\text{Area}}$

Hence, if length and  cross section area both doubled, resistance will remain same i.e inchanged.

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Which gland in human body maintains body temperature?

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Which gland in human body maintains body temperature?

APitutary

BThyroid

CAdrenal

DHypothalamus

pramod ? Jan 2 '2020 at 15:44

Correct answer is: hypothalamus

Explanation:

Much like a thermostat regulates the temperature inside your home, the hypothalamus regulates your body temperature, responding to internal and external stimuli and making adjustments to keep the body within one or two degrees of 98.6 degrees.

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At what temperature do both Centigrade and Fahrenheit thermometers show the same reading?

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At what temperature do both Centigrade and Fahrenheit thermometers show the same reading?

A−20°

B−40°

C42°

D0°

dinesh ? Dec 23 '2019 at 19:56

Correct answer is: −40°

Explanation:

Let F is Fahrenheit and C is Celsius.

The conversion formula is:

$F = C \times \frac{9}{5} + 32$

given that F and C is equal.

so,

$F = F \times \frac{9}{5} +32$

$F- \frac{9F}{5} =32$
$\frac{5F-9F}{5}=32$

$\frac{-4F}{5}=32$

$-4F = 32 \times 5$

$F = - \frac{160}{4}$

$F = -40$

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