Explanation

- A body becomes positively charged when it loses electrons (not gains protons).

- Protons cannot move during rubbing, but electrons can.

- Rubbing transfers electrons from one object to another.

Explanation

- Rate of reaction refers to how fast or slow a reaction takes place.

- It is usually measured as the change in concentration of reactants or products per unit time.

Explanation

- EMF (Electromotive Force) 

-It is the maximum potential difference provided by a source like a battery or cell when no current is flowing.

- Measured in volts (V).

- It is often referred to as the “voltage” of the cell when no load is connected.

Explanation

- Absolute zero is 0 Kelvin or -273.15°C.

- At this temperature, the kinetic energy of particles becomes zero, meaning all molecular motion stops.

- It is the theoretical lowest temperature possible in nature.

Explanation

The maximum value (or peak value) of the sinusoidal current is 14.14 A.

This is found by using the relationship for a sinusoidal wave, where the peak value is the RMS value multiplied by the square root of 2 (approximately 1.414).  

Calculation 

Identify the given information: The RMS value of the current is 10 A.

State the relationship: For a sinusoidal waveform, the relationship between the peak value (I_peak) and the RMS value (I_rms) is:

I_peak = I_rms × √2 

Substitute and solve:

I_peak = 10 A × √2 I_peak = 10 A × 1.414 I_peak ≈ 14.14 A 

Explanation

The cross product of two vectors depends on the sine of the angle between them.

For parallel vectors, the angle is 0° (or 180°), and sin0°=0, so the cross product is zero.

Explanation

Diffraction is the bending of light waves around obstacles or through narrow openings.

It occurs when the size of the obstacle or slit is comparable to the wavelength of light.

Explanation

The standard unit of cell potential, also known as electromotive force (EMF), is the volt (V).

It represents the potential difference between the electrodes of a galvanic cell under standard conditions

(1 M concentration for all species, 1 atm pressure for all gases, and a temperature of 25°C).

Explanation

Resolution improves with decreasing wavelength of light.

To observe a microparticle accurately, short-wavelength light (like blue or UV) gives the greatest precision.

Explanation

According to Stokes' law, drag force 𝐹𝑑=6πηrv.

Hence, drag force is directly proportional to radius r of the sphere.