A physical quantity with magnitude as well as direction is called ………………. quantity.
A) scalar
B) vector
C) linear
D) none of these
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Give the magnitude and direction of the net force acting on: 1. a drop of rain falling down with a constant speed.
1. The drop of rain falls down with a constant speed, hence according to the first law of motion, the net force on the drop of rain is zero. 2. Since...
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State the equation for magnitude of torque and explain various cases of angle between the direction of vectors r and F.
Magnitude of torque, τ = r F sin θ where θ is the smaller angle between the directions of \(\overrightarrow{r}\) and \(\overrightarrow{F}\). Special cases: 1. If θ = 90°, τ = τmax = rF. Thus, the force should be applied along normal direction...
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The property of an element to exist in two or more physical forms with same chemical properties but different physical properties is called
C) allotropy
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The physical quantity with only magnitude is called ………….
Correct option is A) scalar
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Assertion (A): Displacement is a vector. Reason (R) : Displacement has both magnitude and direction.
A) Both A and R are true and R supports A.
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A short bar magnet has a magnetic moment of 0.48 JT^-1. Give the direction and magnitude of the magnetic field produced
Given: m = 0.48 JT-1, r = 10 cm = 0.1 m To find: i. Magnetic induction along axis (Ba) ii. Magnetic induction along equator (Beq) Formulae: i. Ba = \(\frac{\mu_0}{4\pi}\,\frac{2m}{r^3}\) ii. Ba = 2 Beq Calculation: From formula (i), Ba = 10-7 × \(\frac{2\times0.48}{10^{-3}}\) ∴...
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In electrochemical cell, the magnitude and direction of the electrode potential depends on which of the following?
Correct option is: (D) All of these Electrode potential is the tendency of an electrode to accept or to lose electrons. The potential of an electrode is the potential difference between it...
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‘Work’ has A) Only direction, no magnitude
B) Only magnitude, no direction
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Direction and magnitude are fixed for A) normal force
D) gravitational force due to earth
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Give the magnitude and direction of the net force acting on a drop of rain falling down with a constant speed,
a) Zero net force. The rain drop is falling with a constant speed. Hence, it acceleration is zero. As per Newton’s second law of motion, the net force acting on the rain...
2 Answers 1 views