Question
Two short magnets placed along the same axis with their like poles facing each other repel each other with a force which varies inversely as(a) Square of the distance(b) Cube of the distance(c) Distance(d) Fourth power of the distance
✓
Answer
(d) Fourth power of the distance
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A capacitor of capacitance C and the other of capacitance $C / 2$ are connected to a battery of V volt as shown in the figure. The work done in charging both the capacitors fully is :
→Which of the following is true (a) Common base transistor is commonly used because current gain is maximum(b) Common emitter is commonly used because current gain is maximum(c) Common collector is commonly used because current gain is maximum (d) Common emitter is the least used transistor
The refractive index of water is $\frac{4}{3}$ and that of glass is $\frac{5}{3}$. What will be the critical angle for the ray of light entering water from the glass
→According to Biot-Savart's law magnetic field at a point due to a current carrying elements depends upon distance of the point from the element as :
A proton is accelerated through $50,000 V.$ will increase Its energy by
→Heavy water is(a) Water at 4 ℃(b) Compound of deuterium and oxygen (c) Compound of heavy oxygen and heavy hydrogen(d) Water, in which soap does not lather
Line spectrum contains information about(a) The atoms of the prism(b) The atoms of the source(c) The molecules of the source(d) The atoms as well as molecules of the source
Assertion : An electric bulb is first connected to a dc source and then to a ac source having the same brightness in both the cases.
Reason : The peak value of voltage for an $A.C.$ source is $\sqrt{2}$ times the root mean square voltage.
→Reason : The peak value of voltage for an $A.C.$ source is $\sqrt{2}$ times the root mean square voltage.
The momentum of a photon in an $X-$ray beam of $10^{-10}$ metre wavelength is
→If $\overrightarrow{\text{E}}$ and $\overrightarrow{\text{B}}$ are the electric and magnetic field vectors of electromagnetic waves then the direction of propagation of electromagnetic wave is along the direction of:
→